Malicious PDF — malware analysis report

Static analysis result for SHA-256 7420765f0a25a13d…

MALICIOUS

PDF

42.9 KB Created: 2020-10-07 09:06:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 841a2aef103ab228474cd4cc15623016 SHA-1: 9ec91b1bbccd06e894e23ce727580d53085e6375 SHA-256: 7420765f0a25a13d4b8eb6a12de2d8a208817f1b55063f687f2f60764c40d8a3
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://cctraff.ru/pify?keyword=molecular+compound+lewis+structure+worksheet In PDF document text
    • https://site-1042734.mozfiles.com/files/1042734/lupom.pdfIn PDF document text
    • https://site-1039753.mozfiles.com/files/1039753/23543026569.pdfIn PDF document text
    • https://site-1040878.mozfiles.com/files/1040878/41502313719.pdfIn PDF document text
    • https://site-1038768.mozfiles.com/files/1038768/daparamemozupi.pdfIn PDF document text
    • https://site-1039828.mozfiles.com/files/1039828/nupokusakugejufutul.pdfIn PDF document text
    • http://files.marleaevans.com/uploads/1/3/1/4/131452839/760412b3b7863.pdfIn PDF document text
    • http://files.tt-lt-support-network.com/uploads/1/3/2/8/132814958/9447910.pdfIn PDF document text
    • http://wepunox.redimageproductions.com/uploads/1/3/0/9/130969352/677704.pdfIn PDF document text
    • http://files.shortages.net/uploads/1/3/0/7/130775958/2835365.pdfIn PDF document text
    • https://site-1037835.mozfiles.com/files/1037835/zepemugixer.pdfIn PDF document text
    • https://site-1037044.mozfiles.com/files/1037044/fibekofo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006465.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6465 5472 bytes
SHA-256: d67a1aeef60ea684160c640f9003136671f157a44313d63428e436a5adbbba0e
font_01_sfnt_off000076f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76F0 11192 bytes
SHA-256: 807a14161e618534aca4fc05c8832b2356279b6dbd044b2088e1804d48252530